Electric furnace



May 13, 1924. 1,493,842

O. A. CGLBY ELECTRIC FURNACE Filed Dec. 17, 1921 INVENTGR ATORNEY Patented May 13, 92@

Unirse smriie ORA A. COLBY, OF IRVIIN, 'ENNSYLViNA/- SSGIGOB T L MANUFACTURING COMPANY. A CBEORATEOH 0:"

ELECTRICFURNJLFE.

Appncaeon inea December i7, i921.

To all whom it may concern:

Be it known that I, ORA A. Coun?, e. citizen of the United States, und e resident of lrwin, in the counLyY of Xllestnioreleiid-and Stute of Pennsylvania, here invented e new and useful l iprovement in Electric. Furneces, of which the following is specification.

My invention relates lo electrieuil;T heated apparatus, end particularly to electrisresistanee furnaces, and it has or is object to provide u relatively simple and ineiipeir sive mounting Jfor the resistor of en electric furnace.

My invention comprises e, plurality of seis of refractory supporiingj members, lie ends .of which project into the furnace chamber and are so shaped as 'to forni e. groove between eaeli two adjacent and contiguous members having an enlarged inner portion, Within which is located :i member of U forni. A relatively heavy and uiiyielding preformed resistor member is suppored by die inembers of U shape, the resistor member being sufficiently heavy to be subsl'untially self-supporting between the ses of refine tory members. Embodyingr ineens is provided on the refractory members to lool; lie members of U-sliape in their proper operetive positions.

In the single sheet of drawings,

Figure 1 is a View, in vertical cross section, on :i line l-I o2 Figix 2, of un electric furnace coinp'risingn device embodying my invention Fig. 2 is u pari-inl longitudinal sectional vieu' taken on 'the line lw-ll of Fig. 1v;

Fig'. 3 is u view, in end elevution, of :i refractory supporting' member;

Fig. 4 is e. View, in :front elevation, of the member illustruied in Fig. 3, and

Figs. 5, (i and 7 :ire top plein7 freue-:ind end elevational views of n .bushingY comprisingn part of the device embodying; my invention.

An electrie-resisiiince 'furnace l0 coniprises nn outer inet-allie slreleion or 'iraniework il haring u plurelityv of supporinfg members l2. n outer lining 13 comprises e plurality of suitable bricks or bloc-lis of e heut-insulutingr material. jiu inner lining` 14 comprises e plurality oi" bricls or blorlrf: of n suitable high-einperuture-resisiinI nur terinl, the bricks or blocks beineI se disposed Seria lo. 523,212.

dimensions.

T he inner lining lfi is buiit up .in apart sections to proride spaces i6 therebetween. pliirely narrow reliracory nie-. subsrnn'olly cilsliepei ere lee spaces lo, ilie bricks edjzieen "alie being formed rliili evcrliengir io suitably hold the re in their Y furnace.

bers l? so slm p formed beneen each lire in. the sind groove having; un enlur'eff of the bushing i9 being sligh s' less lien ln En) inner portion oi die groove hold the bushing' 19 in iis osition ii vi) ii groove 18, smell orerliiiiign' 'iii .r p. tion 2l ure provided edjueen; bhe sices or mieli of he members i?, iie ien'ftzli Sila. busliingifl) being i lua ineen 'the dangle i. :Sie

linniing ii', elif be um@ of fi. sui o'r` :i suiieble melf..v iron [i i'esisor member '22 comp-rises o inlity subs encinlly sigrziighk and para lelextending` end-Connected conrolufions of e. rod or bei' which is preformed g:o subst-aninll)v the vform. illustrated pziii'iieulsil;`- in Fig Q. The dimensions of the openig' in the member i9 is sue'u that e inenilier inni? lee be placed on er over i poriion of: elution oiL the resisor meinberio op and support lie red in one oi?1 oi nieuniin furnace lornied. resisi eil' in the. grooves 18 When-removing the resistor, itis only necessary to turn the bushings through an angle of substantially 180o by any suitable means, 'which movement opens the groove and permits of removnig lthe `resistor member. rae

2;' The device-embodying my invention provides a'relatively simple means for mounting a relatively heavy and unyielding preformed resistor member in spaced-apart sets of relatively narrow refractory supporting members. The device is of particular value when it is' desired to mount a resistor member of the y,character described in the roof of a furnace chamber but it may also be employed to maintain a resistor member in proper operative position in the side Walls of a furnace.

fzlhis application is closely related to a copending application of Thomas A. Reid, Serial No. 529,0041 filed J an. 13, '1922, and

` assigned to the lVestinghouse Electric &

Manufacturing Company.

Various modifications may be made in the device embodying my invention Without departing from the spirit and scope thereof, and I desire that only such limitations shall be placed thereon as are imposed by the prior art or are specifically set forth in the appended claims.

li claim as my invention \1. A resistor-supporting means comprising a pair of abutting refractory members, each member having a groove in its opposing surface composed of an inner relatively -deep portion and an outer shallow portion,

and a member of substantially U-form lo;y cated in the opposing deeper portions of the cri-operatinggrooves. v

2. In a resistor-supporting means, in lcombination, a plurality of alined refractory members, each member having a slot in its contiguous faces near one. cnd of the mein'- ber, of such shape that the adjacent slots forni an open groove having an enlarged inner portion, a member of substantially iai-form located in the enlarged inner portion for operatively engaging aI resistor member, and embodying means in said refractory members for holding said member of ltl-form in said groeve.

3. in a resistor-supporting means, in combination, a plurality of alined contiguous refractory members, each member having a slot in its contiguous faces near one end of the member, of such shape that the adjalcent opposing slots combine to form an open of each of said members being so shaped.

as to form a groove between twoV adjacent members having an enlarged inner portion, a relatively heavy and unyielding resistor member preformed to compromise a plurality of substantially parallel-extending end-connected convolutions, a portion of a convolution being located in said enlarged inner portion of a groove and the resistor extending between and beyond said sets of refractory members, a member of substantially U-form located in said enlarged portion of said groove and operatively engag-l ing said resistor to support the same, and embodying means in each of said abutting refractory members for holding said member of U-form in said groove.

5. In an electric-resistance' furnace, in combination, a -plural-ity of Walls enclosing a furnace chamber, a plurality of spaced-apart sets of alined abutting relatively narrow refractor members supported by said furnace Wal s, the inner end of said members projectin into said furnace chamber and being so s aped as to form a groove between two adjacent members having an enlarged inner portion, a relatively heavy resistor member preformed to comprise a plurality of end-connected convolutions, a part of each convolution being located-in the enlarged portion of a groove, the remainder extending between and beyond said sets of refractory members and being substantially self-supporting, a member of U-shape located in said groove and operativelyengaging said resistor member and embodying means on said refractory members for holding said member of U-shape in said groove While permitting the expansion and contraction of said resistor member.

6. ln an. electric-resistance furnace, in combination, a plurality of Walls enclosing a furnace chamber, a relatively heavy resistor member preformed to comprise a plurality of end-connected convolutions, a plurality of spaced-apart sets of relatively narrow refractory members supported by said walls and having -the portionsextending into the furnace chamber so shaped as to form a groove between two adjacent members having an enlarged inner portion for receiving a part of a convolution of said resistor member movable thereinto lateral] of said.- furnace, a member of substantial y U-sha. e for hoding said resistor in said enlarge porf tion of the groen and embodying means on .said resistor member.

said remoto -members'for vholdin said 10 member of U-s ape in said oove whi e permlttlng the expansion an subscribed my vember, 1921.

ORA A. COLBY.

name this 25th day of No- 1f 

